While playing the game, press Start to display the options screen. Select the "Button Config" option. Highlight the "Aim" selection, then hold R and press Z(10). If you entered the code correctly, the white boxes around ''Config'' and ''Aim'' will change to red.

Film D

Search the desk on the left side of the S.T.A.R.S. office. The phrase "Its trashed someone must have searched it" will be displayed. Repeatedly search the desk approximately fifty times until a roll of film is found. Take the film and develop it in the photo lab to see a picture of Rebecca in a basketball uniform.

Bonus weapons

Successfully complete either character's first scenario in under two hours and thirty minutes with an A or B ranking for the rocket launcher with infinite ammunition. Successfully complete either character's second scenario in under two hours and thirty minutes hours with an A or B ranking for the gatling gun with infinite ammunition. Successfully complete either character's second scenario in under three hours with an A or B ranking for the machine gun with infinite ammunition. Note: The bonus weapon will appear in the next game after the first chest is opened.

Hunk scenario

Successfully complete either character's second scenario in under two hours and thirty minutes with saving less than twelve times. Hunk is a soldier that must reach the second floor of the police station from the sewer with just battles and no puzzles.

Tofu scenario

Successfully complete either character's first and second scenarios in less than three hours. Then, play the game again with the other character, and successfully complete their first and second scenarios in less than three hours. Play the game a third time and complete either character's first and second scenarios again in less than three hours. Note: The game must be saved less than twelve times during each of the six scenarios played and bonus weapons must not be used. Tofu is a piece of tofu (food) that must reach the second floor of the police station from the sewer with just battles and no puzzles. Tofu can not use any weapons other than a knife.

Alternate uniforms

Start a game on the normal difficulty setting. Then, go to the police station without collecting any items. Quickly move past the zombie that appears in the alley near the police station. Collect the shotgun, then kill the zombie. Take the special key from the zombie's body and go to the dark room to open the lockers with alternate uniforms. Claire has a single alternate uniform, with a quick shooting revolver. Leon has two alternate uniforms, one of which will allow him to shoot with one hand.

Extreme battle mode

Successfully complete both of either character's scenarios with an "A" rank, then go to the "Special" option. A new "Extreme battle mode" selection will be unlocked.